Tsp-Link Synchronization Lines - Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Front-panel control of output enable
To activate the output enable line:
1. Press the CONFIG key followed by the OUTPUT ON/OFF control.
2. Choose DIO-CONTROL, then press the ENTER key or the navigation wheel
3. Select OE_OUTPUT_OFF to activate the output enable signal causing the source-measure unit
(SMU) output to be blocked if the output enable is not asserted (connected to +5 V). Select
NONE to deactivate the output enable signal so that its state has no effect on the SMU output.
4. Press the EXIT (LOCAL) key as needed to return to the normal display.
Remote control of output enable
Use one of these commands to control output enable action:
smua.source.outputenableaction = smua.OE_NONE
smua.source.outputenableaction = smua.OE_OUTPUT_OFF
When set to smuX.OE_NONE, the Model 2651A does not take action when the output enable line is
low. When set to smuX.OE_OUTPUT_OFF, the instrument will turn its output off as if the
smua.source.output = smua.OUTPUT_OFF command had been received. The instrument will
not automatically turn its output on when the output enable line returns to the high state. For example,
the following command activates the output enable for SMU A:
smua.source.outputenableaction = smua.OE_OUTPUT_OFF

TSP-Link synchronization lines

The Model 2651A has three synchronization lines that you can use for triggering, digital I/O, and to
synchronize multiple instruments on a TSP-Link
Connecting to the TSP-Link system
The TSP-Link
connectors located on the back of the Model 2651A. If you are using a TSP-Link network, you do not
have to modify any connections. See
detailed information about connecting to the TSP-Link system.
Using TSP-Link synchronization lines for digital I/O
Each synchronization line is an open-drain signal. When using the TSP-Link
for digital I/O, any node that sets the programmed line state to zero (0) causes all nodes to read 0
from the line state. This occurs regardless of the programmed line state of any other node. See the
table in the
2651A-901-01 Rev. A / March 2011
®
synchronization lines are built into the TSP-Link connection. Use the TSP-Link
Digital I/O bit weighting
®
network.
TSP-Link system expansion interface
(on page 3-87) topic for digital bit weight values.
Section 3: Functions and features
.
(on page 6-47) for
®
synchronization lines
3-89